Attributes defining the functionality for the entire category. Records data correspondences between the items in this data category and and related data items in Nexus data dictionary. Text description of a category. An identifier that may be used to distinguish the contents of like categories between data blocks. Whether the category must be specified in a dictionary. The identity of the data category. Data items may only be looped with items of the same category. Example applications and descriptions of data items in this category. A description of an example attribute case in category category_examples A case of examples involving items in this category. The name of category. Provides a list of category groups to which the base category belongs. The name of a category ... The name of a category group ... This category provides the definition of each category group. A category group is a collection of related categories. Text description of a category group... The name of the optional parent category group. The name of a category group ... This category holds a list of the item names that uniquely identify the elements of the category. The identifier of the category (eg. a component of the primary key). The name of a data item that serves as a key identifier for the category (eg. a component of the primary key). Attributes specifying the association between categories and methods. The name of the category The name of the method Attributes defining the characteristics of a data block. Text description of the data block. The identity of the data block. Attributes specifying the association between data blocks and methods. Identifier of data block. Unique method identifier associated with a data block. Attributes for specifying the dictionary title, version and data block identifier. Title identification of the dictionary. A unique version identifier for the dictionary. The identifier for the data block containing the dictionary. Attributes for specifying the revision history of the dictionary. Text description of the dictionary revision. The date that the last dictionary revision took place. A unique version identifier for the dictionary revision. Attributes which describe the characteristics of a data item. This is category id of the item. Signals if the defined item is mandatory for the proper description of its category. Data name of the defined item. This category holds a list of possible alias names or synonyms for each data item. Each alias name is identified by the name and version of the dictionary to which it belongs. Name for the data item. Alias name for the data item. The dictionary in which the alias name is defined. The version of the dictionary in which the alias name is defined. Attributes specifying the default value for a data item. The default value for the defined item if it is not specified explicitly. If a data value is not declared, the default is assumed to be the most likely or natural value. The name of item for which the default value is defined Attributes which identify other data items that must be specified for the defined data item to be valid. Data name of a dependent item. Item name of a dependent item. This category holds the descriptions of each data item. Text description of the defined data item. Tne name of data item. Attributes which specify the permitted enumeration of the items. A description of a permissible value for the defined item. An alternative form of the permissible value for display purposes. A brief description of a permissible value for the defined item. Where the enumeration refers to a type, the code for the units of expression for this type. Name of data item. A permissible value, character or number, for the defined item. Attributes for describing application examples of the data item. A description of an example specified in attribute case in category item_example An example application of the defined data item. The name of data item for the example. Attributes which describe how equivalent data items are linked within categories and across different categories. Name of the child data item. Name of the parent data item. Attributes specifying the association between data items and methods. The name of the item method The name of the item The range of permissible values of a data item. When multiple ranges are specified they are interpreted sequentially using a logical OR. To specify that an item value may be equal to a boundary value, specify an item range where the maximum and minimum values equal the boundary value. Maximum permissible value of a data item or the upper bound of a permissible range. ( maximum value > data value) Minimum permissible value of a data item or the lower bound of a permissible range. ( minimum value < data value) Name of data item ... Name of data item ... Attributes which specify recognized relationships between data items. The code for the type of relationship of the item identified by attribute name in category item_related and the defined item. ALTERNATE indicates that the item identified in attribute related_name in category item_related is an alternative expression in terms of its application and attributes to the item in this definition. ALTERNATE_EXCLUSIVE indicates that the item identified in attribute related_name in category item_related is an alternative expression in terms of its application and attributes to the item in this definition. Only one of the alternative forms may be specified. CONVENTION indicates that the item identified in attribute related_name in category item_related differs from the defined item only in terms of a convention in its expression. CONVERSION_CONSTANT indicates that the item identified in attribute related_name in category item_related differs from the defined item only by a known constant. CONVERSION_ARBITRARY indicates that the item identified in attribute related_name in category item_related differs from the defined item only by a arbitrary constant. REPLACES indicates that the defined item replaces the item identified in attribute related_name. in category item_related REPLACEDBY indicates that the defined item is replaced by the item identified in attribute related_name. in category item_related ASSOCIATED_VALUE indicates that the item identified in attribute related_name in category item_related is meaningful when associated with the defined item. ASSOCIATED_ESD indicates that the item identified in attribute related_name in category item_related is the estimated standard deviation of of the defined item. Identifies a defined data item ... Identifies a data item by name which is closely related to the defined data item by the manner described by attribute function_code in category item_related This category holds the association between data items and named vector/matrix declarations. Provides an indirect reference into the list of structure type definition in category item_structure_list. Identifies if the struct is defined in column or row major order. Only the unique elements of symmetric matrices are specified. The name of data item This category holds a description for each structure type. Identifies the length of this row/column of the structure. The name of the matrix/vector structure declaration. Identifies the one based index of a row/column of the structure. This category assigns data items to subcategories. An optional label for an instance of a subcategory within a category The identifier of subcategory The name of data item Attributes for specifying the data type code for each data item. Data type of defined data item The name of data item Attributes for specifying additional conditions associated with the data type of the item. Codes defining conditions on the attribute code in category item_type specification. 'esd' permits a number string to contain an appended standard deviation number enclosed within parentheses. E.g. 4.37(5) 'seq' permits data to be declared as a sequence of values separated by a comma <,> or a colon <:>. * The sequence v1,v2,v3,. signals that v1, v2, v3, etc. are alternative values or the data item. * The sequence v1:v2 signals that v1 and v2 are the boundary values of a continuous range of values. This mechanism was used to specify permitted ranges of an item in previous DDL versions. Combinations of alternate and range sequences are permitted. The name of data item Attributes which define each type code. When a data value can be defined as a pre-determined sequence of characters, or optional characters, or data names (for which the definition is also available), it is specified as a construction. The rules of construction conform to the the regular expression (REGEX) specifications detailed in the IEEE document P1003.2 Draft 11.2 Sept 1991 (ftp file '/doc/POSIX/1003.2/p121-140'). Resolved data names for which attribute construct in category item_type_list specifications exist are replaced by these constructions, otherwise the data name string is not replaced. typical construction for _date {_year}-{_month}-{_day} An optional description of the data type The codes specifying the primitive type of the data value. The codes specifying the nature of the data value. Specifies the physical units in which data items are expressed. The identifier of unit in which the data item is expressed. The name of data item Conversion factors between the various units of measure defined in the item_units_list category. The arithmetic operation required to convert between the unit systems: <to_code> = <from_code> <operator> <factor> The arithmetic operator required to convert between the unit systems: <to_code> = <from_code> <operator> <factor> The unit system on which the conversion operation is applied to produce the unit system specified in attribute to_code. in category item_units_conversion <to_code> = <from_code> <operator> <factor> The unit system produced after an operation is applied to the unit system specified by attribute from_code. in category item_units_conversion <to_code> = <from_code> <operator> <factor> Attributes which describe the physical units of measure in which data items may be expressed. A description of the unit of measure. The code specifying the name of the unit of measure. Attributes specifying the list of methods applicable to data items, sub-categories, and categories. A code that describes the function of the method. method to calculate the item calculation method to verify the data item verification method to provide cast conversion cast method to define item + item addition method to define item / item division method to define item * item multiplication method to define item = item equivalence miscellaneous method other Description of application method in attribute id in category method_list A language specific reference to the implementation of the method. A code that describes the source of the method implementation. inline method implementation inline reference to an external method implementation reference Inline text of the method implementation. Implementation language in which the method is expressed. C C++ Python Ruby Java Javascript other Identity of method in the list referenced by attribute id in category method Alternate description of data items in this category. Alternate text description of a category. Alternate example applications and descriptions of data items in this category. Alternate description of an example attribute case in category category_examples Alternate case of examples involving items in this category. Attributes for specifying an alternate mandatory code for each data item. Alternate mandatory code for defined data item The name of data item This category holds the alternate descriptions of each data item. Alternate text description of the defined data item. Data name of the defined item. Attributes which specify the permitted enumeration of the items. A description of a permissible value for the defined item. A permissible value, character or number, for the defined item. Attributes for describing application examples of the data item. Alternate description of an example specified in attribute case in category ndb_item_example Alternate example application of the defined data item. An alternative set of permissible range values of a data item. When multiple ranges are specified they are interpreted sequentially using a logical OR. To specify that an item value may be equal to a boundary value, specify an item range where the maximum and minimum values equal the boundary value. Alternate maximum permissible value of a data item or the upper bound of a permissible range. ( maximum value > data value) Alternate minimum permissible value of a data item or the lower bound of a permissible range. ( minimum value < data value) Name of data item ... Name of data item ... Attributes for specifying an alternate data type code for each data item. Alternate data type of defined data item The name of data item Category definition conditional context describing the scope of usage and distribution for the category. Category context action. The action to suppress the release of data the category with this context suppress Category conditional context identifier A category context that depends on acceptance of GDPR terms and conditions WWPDB_ACCEPT_GDPR_TERMS_CONDITIONS Category definition context describing the scope of usage and distribution for the category. Category context type An category used internally by the wwPDB and not distributed in archival entries WWPDB_LOCAL Alternate description of data items in this category. Alternate text description of a category. Alternate example applications and descriptions of data items in this category. Alternate description of an example attribute case in category category_examples Alternate case of examples involving items in this category. Specifies the operators available for value condition comparisons. Description of the comparison operator. A code for the comparison operator. Attributes which define contextual conditions among target items. Comparison operation for the condition applied to either the target item value or to the value of the dependent item. Name of the dependent data item for the condition. The logical conjunction for combining multiple conditions. Name of the target data item for the condition. Value of the value data item for the condition. The an identifier for each conditional context. The ordinal identifier for each condition within a context. Attributes for specifying a component dictionary title, version and data block identifier. Title identification of the dictionary component. A unique version identifier for the dictionary component version. The identifier for the data block containing the dictionary component. The identifier for the dictionary component. Attributes for specifying the revision history for a dictionary component. Text description of the dictionary component revision. The date that the last dictionary component revision took place. A unique dictionary component identifier for the dictionary component. A unique version identifier for the dictionary component revision. Category describing the details of dictionary composition achieved through category-level content inclusion from external dictionary sources. Inclusion directives in this category take precedence over any dictionary-level include directives in category PDBX_INCLUDE_DICTIONARY. The identifier for the target category within the destination dictionary. The action undertaken to resolve category name conflicts subject to the current category-level include directive. Unique identifier for a source category within the included dictionary. Unique identifier for the included dictionary. Category describing the details of dictionary composition achieved through dictionary-level content inclusion from external sources. Inclusion directives in this category may be used to include the contents of complete dictionary text files. A finer level of control may be obtained by combining dictionary as well as category item-level include directives in categories PDBX_INCLUDE_CATEGORY and PDBX_INCLUDE_ITEM. Network accessible locator for the included dictionary text. URL linking to the PDBx/mmCIF dictionary http://mmcif.wwpdb.org/dictionaries/ascii/mmcif_pdbx_v40.dic The namespace prefix used in the included source dictionary. Namespace prefix used by the wwPDB in the PDBx/mmCIF dictionary pdbx_ Replacement namespace prefix. lcl_ Item definition describing the action undertaken to resolve name category name conflicts on including dictionary content. Identifier of data block. Unique identifier for the included dictionary or dictionary component. Category describing the details of dictionary composition achieved through item-level content inclusion from external sources. Item inclusion directives in this category take precedence over any category-level include directives in category PDBX_INCLUDE_CATEGORY. The identifier for the target item within the destination dictionary. The action of taken to resolve item name conflicts subject to the current item-level include directive. Unique identifier for included dictionary. Unique identifier for a target item within the included dictionary. Attributes for specifying an alternate mandatory code for each data item. This is category id of the item. Alternate mandatory code for defined data item The name of data item Category definition conditional context describing the scope of usage and distribution for the category. Item context action. The action to suppress the release of the data item with this context suppress-item Item conditional context identifier An item context that depends on acceptance of GDPR terms and conditions WWPDB_ACCEPT_GDPR_TERMS_CONDITIONS Item definition context describing the scope of usage and distribution for the category. Item definition context type An item used internally by the wwPDB and not distributed in archival entries WWPDB_LOCAL This category holds the alternate descriptions of each data item. Alternate text description of the defined data item. Data name of the defined item. Attributes which specify the permitted enumeration of the items. A description of a permissible value for the defined item. An alternative form of the permissible value for display purposes. A permissible value, character or number, for the defined item. Attributes describing the additional details about the enumeration of the data item. A flag to indicate that this item may assume values outside of its specified enumeration list at deposition. An item which may assume values outside of defined enumeration values at deposition no Data name of the defined item. Attributes for describing application examples of the data item. Alternate description of an example specified in attribute case in category pdbx_item_example Alternate example application of the defined data item. Attributes which describe how equivalent data items are linked within categories and across different categories subject to value conditions within the child data category. Name of the child data item. The comparison operation for the child value condition The logical conjunction for combining multiple conditions. Name of the child data item subject to the value condition. Name of the data item which is the target of the value condition. The data value for the child value condition. An identifier for each value condition. A condition may span multiple item and value pairs. Name of the parent data item. A unique identifier for each record. Attributes describing logical groups among item link relationships. The category containing the item link group. The unique identifier for the link group within the category. Enumeration of item link membership within each item linked group. The child category containing the item link group. The item name of the child item in the item linked relationship. The unique identifier for the link group within the category. The parent category containing the target of the item link relationship. The item name of the parent item in the item linked relationship. An alternative set of permissible range values of a data item. When multiple ranges are specified they are interpreted sequentially using a logical OR. To specify that an item value may be equal to a boundary value, specify an item range where the maximum and minimum values equal the boundary value. Alternate maximum permissible value of a data item or the upper bound of a permissible range. ( maximum value > data value) Alternate minimum permissible value of a data item or the lower bound of a permissible range. ( minimum value < data value) Name of data item ... Name of data item ... Attributes assigning membership in sets of data items. An item set identifier. The set of data items defining R-value statistics RVALUE_ITEM_SET Attributes defining the properties of item sets. Additional details describing the item set. The item set type. If one member of the item set is provided then all members are required if_one_then_all_required The exception level associated with failure to satisfy the requirements of the item set type. Exceptions are considered errors error An item set identifier. The set of data items defining R-value statistics RVALUE_ITEM_SET Attributes for specifying an alternate data type code for each data item. Alternate data type of defined data item The name of data item Attributes which describe those items sharing conditional dependency relationship where the value of a target item depends on the values of its dependent partner items. Name of a dependent data item. Name of the target data item. Attributes which define value conditions among dependent items. Comparison operation for the value condition. Name of the dependent data item for the value condition. Value of the dependent data item for the value condition. The logical conjunction for combining multiple conditions. Name of the target data item for the value condition. Value of the dependent data item for the value condition. The unique identifier for each value condition. The purpose of a sub-category is to define an association between data items within a category and optionally provide a method to validate the collection of items. The sub-category named 'cartesian' might be applied to the data items for the coordinates x, y, and z. Description of the sub-category. The identity of the sub-category. Example applications and descriptions of data items in this subcategory. A description of an example attribute case in category sub_category_examples An example involving items in this subcategory. The name for the subcategory. Attributes specifying the association between subcategories and methods. The name of the method The name of the subcategory